Vise shears



G. M. ERNST VISE SHEARS June 3, 1947.

Filed Fair. 19, 1946 9 R mm M, W

mi N Patented June 3, 1947 UNITED STATES PATENT OFFICE 5 Claims.

This invention relates to a shearing device for use in an ordinary machinists or bench vise, and has for its principal object the provision of a simple, sturdy, and highly efficient device which can be easily and quickly slipped between the jaws of a conventional vise and used for shearing and cutting metal bars, rods, etc.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efficiency. These will become more apparent from the following description.

In the following detailed description of the invention, reference is had to the accompanying drawing which forms a part hereof. Like numerals refer to like parts in all views of the drawing and throughout the description.

In the drawing:

Fig. 1 is a perspective view illustrating how the improved shearing device would appear in a conventional bench vise;

Fig. 2 is an enlarged plan view of the improved shearing device;

Fig. 3 is a side view thereof;

Fig. 4 is an edge view thereof; and

Fig. 5 is a vertical section, taken on the line 4--4, Fig. 3.

In Fig. 1 the parts of a typical bench vise are designated by numeral as follows: fixed vise jaw It, movable vise jaw II; vise screw I2; and supporting bench it. The improved shearing device is designed to be positioned between the two jaws I and II, and to be actuated by rotation of the vise screw I2.

The improved shearing attachment consists of two specially shaped shearing plates I4 and I pivoted together at their bottoms upon a suitable pivot bolt It. The two plates I l and I5 are identical but are turned in opposite directions on the pivot bolt It so as to face each other. They are maintained in overlapping, shearing relation by means of stop bolts I'I, each bolt being fixed in one of the plates and riding in an arcuate slot I8 in the other of the plates. The bolts I! and the slots I8 act to limit the relative arcuate movement about the pivot bolt I6 and to hold the plate snugly together to obtain maximum shearing action.

The two plates are constantly urged to swing outwardly about the pivot, bolt It by means of a wire spring I9, which, at its middle, is wrapped about the head of the pivot bolt I6 and at its extremities enters receiving openings 20 in the plates I4 and I5.

Each plate is provided with a plurality of bar openings2l differing in size and shape for receiving the various bars to be sheared. Each plate is provided at its upper edge with a shearing notch 22 for receiving material which cannot; conveniently be passed through the openings 28. When the two plates are in their outermost position, the openings 2| and the notches 22 of the two plates align with each other, as shown in Figs. 2. and 3. The openings 2| and the notches 22 are forced out of alignment with each other by inserting the plates between the jaws l0 and II of the vise and rotating the vise screw I2.

Each plate is provided with a shoulder portion 23 which projects beyond the edge thereof and rests upon the vise jaw to support the device thereon. The plates are maintained in right angular relation with the vise jaws by means of projecting guide pins 24. The pins 24 are placed directly below the shoulders 23 so that they will contact with the upper edge of the vise jaw to prevent the device from twisting.

The action of the device is believed to be readily apparent from the above. Bars, such as the one indicated at 25 in Fig. 1, may be sheared by inserting them through the openings 2| and rotatin the vise screw I2. Material which will not fit into the openings 2| can be inserted into the shearing notch 22 and similarly sheared by operating the vise screw I2.

It will be noted that the device requires no mechanical connection with the vise itself and can be easily lifted from or dropped into place therein.

While a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent is:

1. A shearing device for use between the jaws of a vise comprising: two shearing plates; a hinge pin acting to maintain said plates in overlapping relation; means on said plates for supporting them between the jaws of the vise; and spring means for urging said plates toward the separated position, there being a notch formed in the upper edge of each plate, said notches aligning with each other when the plates are in the separated position.

2. A shearing device for use between the jaws of a vise comprising: two shearing plates; a hinge pin acting to maintain said plates in overlapping relation; means on said plates for supporting them between the jaws of the vise; spring means for urging said plates toward the separated position, there being a notch formed in the upper edge of each plate, said notches aligning with each other when the plates are in the separated position; and stop means carried by the plates for stopping the separating movement when said notches are in alignment.

3. A shearing device for use between the jaws of a vise comprising: two shearing plates; a hinge pin acting to maintain said plates in overlapping relation; means on said plates for supporting them between the jaws of the vise; spring means for urging said plates toward the separated posiand a projecting shoulder on each plate for supporting it on the jaw of a vise, there being openings in both plates positioned to align with each other when the plates are in the separated position.

5. A shearing device for use between the jaws of a vise comprising: a pair of shearing plates; a pivot bolt passing through both plates adjacent their lower extremities; shearing openings formed in said plates adjacent their upper extremities; a stop member projecting from each plate through an elongated slot in the other plate for limiting their movements about said pivot bolt; pins projecting oppositely outward from each plate for aligning them with the jaws of the vise; a Projecting shoulder on each plate for supporting it edge of each plate, said notches aligning with each other when the plates are in the separated position; stop means carried by the plates for stopping the separating movement when said notches are in alignment; and aligning means projecting from said plates and contacting the inner edges of said jaws to maintain said device at right angles to the latter.

4. A shearing device for use between the jaws of a vise comprising: a pair of shearing plates; a pivot bolt passing through both plates adjacent their lower extremities; shearing openings formed in said plates adjacent their upper extremities; a stop member projecting from each plate through an elongated slot in the other plate for limiting their movements about said pivot bolt; pins projecting oppositely outward from each plate for aligning them with the jaws of the vise;

on the jaw of a vise, there being openings in both plates positioned to align with each other when the plates are in the separated position; and an elongated spring secured at each of its extremities to one of said plates and passing around said pivot bolt intermediate its extremities.

GEO. M. ERNST.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Date 

